From c5a1fbca6f35a85e9167b2cd9f7257eff0274f8b Mon Sep 17 00:00:00 2001 From: George Cherian Date: Thu, 22 May 2014 09:31:37 +0530 Subject: [PATCH] usb: dwc3: dwc3-omap: Fix the crash on module removal Following crash is seen on dwc3_omap removal Unable to handle kernel NULL pointer dereference at virtual address 00000018 pgd = ec098000 [00000018] *pgd=ad1f9831, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] SMP ARM Modules linked in: usb_f_ss_lb g_zero usb_f_acm u_serial usb_f_ecm u_ether libcomposite configfs snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_hwdep snd_soc_omap snd_pcm_dmaengine snd_soc_core snd_compress snd_pcm snd_tim] CPU: 0 PID: 1296 Comm: rmmod Tainted: G W 3.15.0-rc4-02716-g95c4e18-dirty #10 task: ed05a080 ti: ec368000 task.ti: ec368000 PC is at release_resource+0x14/0x7c LR is at release_resource+0x10/0x7c pc : [] lr : [] psr: 60000013 sp : ec369ec0 ip : 60000013 fp : 00021008 r10: 00000000 r9 : ec368000 r8 : c000e7a4 r7 : 00000081 r6 : bf0062c0 r5 : ed7cd000 r4 : ed7d85c0 r3 : 00000000 r2 : 00000000 r1 : 00000011 r0 : c086d08c Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment user Control: 10c5387d Table: ac098059 DAC: 00000015 Process rmmod (pid: 1296, stack limit = 0xec368248) Stack: (0xec369ec0 to 0xec36a000) 9ec0: 00000000 00000001 ed7cd000 c034de94 ed7cd010 ed7cd000 00000000 c034e194 9ee0: 00000000 bf0062cc ed7cd010 c03490b0 ed154cc0 ed4c2570 ed2b8410 ed156810 ed156810 bf006d24 c034db9c c034db84 c034c518 9f20: bf006d24 ed156810 bf006d24 c034cd2c bf006d24 bf006d68 00000800 c034c340 9f40: 00000000 c00a9e5c 00000020 00000000 bf006d68 00000800 ec369f4c 33637764 9f60: 616d6f5f 00000070 00000001 ec368000 ed05a080 c000e670 00000001 c0084010 9f80: 00021088 00000800 00021088 00000081 80000010 0000e6f4 00021088 00000800 9fa0: 00021088 c000e5e0 00021088 00000800 000210b8 00000800 e04f6d00 e04f6d00 9fc0: 00021088 00000800 00021088 00000081 00000001 00000000 be91de08 00021008 9fe0: 4d768880 be91dbb4 b6fc5984 4d76888c 80000010 000210b8 00000000 00000000 [] (release_resource) from [] (platform_device_del+0x6c/0x9c) [] (platform_device_del) from [] (platform_device_unregister+0xc/0x18) [] (platform_device_unregister) from [] (dwc3_omap_remove_core+0xc/0x14 [dwc3_omap]) [] (dwc3_omap_remove_core [dwc3_omap]) from [] (device_for_each_child+0x34/0x74) [] (device_for_each_child) from [] (dwc3_omap_remove+0x6c/0x78 [dwc3_omap]) [] (dwc3_omap_remove [dwc3_omap]) from [] (platform_drv_remove+0x18/0x1c) [] (platform_drv_remove) from [] (__device_release_driver+0x70/0xc8) [] (__device_release_driver) from [] (driver_detach+0xb4/0xb8) [] (driver_detach) from [] (bus_remove_driver+0x4c/0x90) [] (bus_remove_driver) from [] (SyS_delete_module+0x10c/0x198) [] (SyS_delete_module) from [] (ret_fast_syscall+0x0/0x48) Code: e1a04000 e59f0068 eb14505e e5943010 (e5932018) ---[ end trace 7e2a8746ff4fc811 ]--- Segmentation fault [ balbi@ti.com : add CONFIG_OF dependency ] Signed-off-by: George Cherian Signed-off-by: Felipe Balbi --- drivers/usb/dwc3/Kconfig | 1 + drivers/usb/dwc3/dwc3-omap.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig index 8eb996e4f058..261c3b428220 100644 --- a/drivers/usb/dwc3/Kconfig +++ b/drivers/usb/dwc3/Kconfig @@ -45,6 +45,7 @@ comment "Platform Glue Driver Support" config USB_DWC3_OMAP tristate "Texas Instruments OMAP5 and similar Platforms" depends on EXTCON && (ARCH_OMAP2PLUS || COMPILE_TEST) + depends on OF default USB_DWC3 help Some platforms from Texas Instruments like OMAP5, DRA7xxx and diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c index 4af4c3567656..737fdbe5e1a1 100644 --- a/drivers/usb/dwc3/dwc3-omap.c +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -322,7 +322,7 @@ static int dwc3_omap_remove_core(struct device *dev, void *c) { struct platform_device *pdev = to_platform_device(dev); - platform_device_unregister(pdev); + of_device_unregister(pdev); return 0; } -- 2.20.1